AZD1981是一种有效的,选择性CRTh2 (DP2) receptor拮抗剂,IC50为4 nM,比作用于340种其他酶和受体(包括DP1)选择性高1000多倍。;AZD1981 is a potent, selective CRTh2 (DP2) receptor antagonist with IC50 of 4 nM, showing >1000-fold selectivity over more than 340 other enzymes and receptors, including DP1.